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BLUEBIRD BIO INC
BLUEBIRD BIO INC. Institutional holdings reported to the SEC.

Institutional Holders (2015Q1)
Portfolio Summary: 4 Institutional holders with a total value of $43,396,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 SABBY MANAGEMENT, LLC 2,996 36,183,000 83.38% Call
2 CITADEL ADVISORS LLC 37,300 4,505,000 10.38% Call
3 GROUP ONE TRADING LLC 19,100 2,307,000 5.32% Call
4 SIMPLEX TRADING, LLC 85 401,000 0.92% Call

From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.